Mechanical movement.



PATENTED 36.4, 1908.

.H. M. RUSSELL, J1. MECHANICAL MOVEMENT. APPLIOATIOI! FILED AYE. 13, 19.

2 BBBBTHEBE! 1.

HENRY M. RUSSELL, JR, OF \VHEELING, EST VIRGIYIA.

MECHANICAL MO-VEMENT.

Specification of Letters Patent.

Patented Aug. 4, 1908.

Application filed April 13, 1908. Serial No. 426,744.- I

' T all whom it may concern:

Be it known that I, HEXRY M. RUSSELL, J r., of Wheeling, Ohio county,\Vest Virginia,

have invented a new and useful Improvement in Mechanical Movements, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 is a plan partly in section of anelementary form of device embodying my invention, Fig. 2 is an elevationpartly in sec- A tion of a more complex device embodying my invention.In Fig. 2 two of the members are merely lndicated by dotted lines toavoid v confusion. Fig. 3 is a top view of one of the members indicatedby dotted lines in Fig. 2. Fig. 4 is a cross section of both of the saidmembers.

My invention has relation to mechanical movements employed for variousurposes and especially to those used as equa izing or balance gears inmotor cars and also to mechanical movements used for the transmission ofpower from engines to other machincry.

One object of my invention is to provide an equalizing gear which shalloperate positively without the use of toothet gearing.

Another object of my invention is to provide a. device capable ofcausing a driven shaft to rotate at a speed different from that of thedriving shaft without employing toothed gears or friction contacts.

Another object of my invention is to novide a substitute for toothedgearing which shall operate with. less jar, less noise and lessliability to breakage than the latter.

Hy invention consists of three alined members differentially connectedby conic link work, the said conic link work comprisin rings pivoted toone of the said members anu having slots in them adapted to engage thepins of cranks connected with the other two of the said members.

Fig. 1 shows an elementary form of the device partly in section. A cageor housing made 11 of opposite halves 1 and 2 held together y bolts 14which also hold in place the s )rocket 11 has bearings at opposite sidesfor the shafts of the cranks 5 and 6. The cranks are seen more clearlyin Fig. 2. A hearing member 7 supports the ends of 5 and 6. The cage hasa central pin 8 upon which the ring 12 may oscillate. This ring 12 hasin its sides slots whose centers lie in a plane passing through thecenter line of the pin 8. The crank pins of 5 and 6 pass through theseslots. The pins of the cranks 5 and 6 are so placed that their centerlines pass through the center of the device, that is tlirough theintersection of the main axis of 5 and 6 with the center line of the pin8. Since the center planes of the slots also ass through the center ofthe device, it is p ain that the mechanism will be movable and that thecrank pins if they fit the slots in one position must fit them in anyposition which the cranks can occupy. It isalso clear since the deviceis symmetrical that the cranks, if they move at all, must have e 'ualand opposite movements. Assume t 1e cage to be stationary and the crank6 to turn toward the top of the figure; this will tilt the ring 12 outof its 4 horizontal lane and the o posite side of the ring 12 wil pushthe cranii 5 down throu h the same angle as that through which t e crank6 has moved but in the opposite direction. This shows that we have aperfect differential action.

It will be seen that when crank 6 has turned through 90 the crank 5 willhave turned 90 in the opposite direction and the cranks will be 0)posite. In this position the ring 12 is at the limit of its oscillationand can transmit no power. The device is therefore on a dead center.This may be overcome by using four cranks and two rings similar to 12but set at right angles to each other. fer the arrangement shown inFigs. 2, 3 and 4 which illustrate the device in its complete practicalform. Only two cranks are employed but two rings 9 and 10 are usedinstead of the single ring 12. Fig. 2 shows the complete device, exceptthat the dotted lines merely indicate the general positions that wouldbe occupied by the rings. VVashers 13 separate 9 and 10. Fig. 3 shows atop view of the ring 9 and it will be seen that the slots instead ofbeing parallel to the axis of the oscillation of the ring are turned atan angle of 30 to this axis. The effect of this is to make the deadcenter come when the cranks are 90 degrees apart instead of when theyare opposite. Fig. 4 is a cross-section of both rings 9 and '10 andshows the relative positions of the slots inthe two rings. For clearnesswashers are not shown in Figs. 3 and 4. It will be seen that the slotsin one rin are placed somewhat like the threads on a i ouble threadright-handed screw, while those in the other ring are placed like the Iprei threads on a left handed screw. The effect of this 18 to make thedead centers of the two systems come ninety degrees apart and so to'produce continuous IOEEWhlS may be clearly seen by remembering that thedead center occurs when the ring has reached the limit of itsoscillation. The different positions of the slots makes this occur atdifferent times with the two rings and it may be shown that with theslots tilted 30 degrees the dead centers are just 90 degrees apart.

It is to be understood that the linkage may be connected in various waysand that various changes may be made in the structural details-withoutdepartin from the principle of the invent-ion. It wifi also be seen thatthe motion of the cranks in the slots is such that bushings might beused having fiat sides to give a large bearing surface against the sidesof the slots.

What I claim is:

1. In a mechanical improvement the combination of three alined revolublcmembers and conic link work differentially connecting the said members,the said conic link work comprising slotted rings and cranks sliding inthe slots in the said rings.

2. In a mechanical movement the combination of three alined revolublemembers and mechanism connecting them differentially, the said mechanismconsisting of conic link work and slot and pin movements in combination,substantially as described.

3. In a mechanical movement the combination of three alined revolublemembers, cranks attached to two of the said members,- pins on the saidcranks so laced that their center lines produced shall intersect theaxis of the said members at. the same point and shall make equal anglestherewith and a ring connected with the third of the said members sothat it may turn about an axis per endicular to the main axis of thedevice at t 1e point where the said center lines intersect the lastnamed axis and having slots in its 0 posite sides adapted to engage thepins of t 1e said cranks, substantially as described.

4. In a. mechanical movement the combination of two cranks alined witheach other and a third member alined with the said cranks; pins on thesaid cranks making angles of 45 with the said axis, a. in connected withthe said third member ma- 'ing arr-angle of 90 with the said axis, thecenter lines of all the pins intersecting the said axis at a commonpoint two concentric rings having their centers at the last mentionedpoint of intersection and turning about the said pin on the third memberand each ring having slots in its opposite side adapted to engage thepins on the said cranks, the said slots in each rim being symmetricalwith respect to the said pin on the third'member but not lying in aplane through that pin and the said slots in one ring being placed likethe threads on a right-handed screw and those in the other ring like thethreads on a left-handed screw, substantially as described.

5. In a mechanical movement the combination of three alined revolublemembers and mechanism differentially connecting the said members, thesaid mechanism comprising cranks attached respectively to two of thesaid cranks and two systems of conic link work intermediate of the saidpins and the said third member, the two systems being so constructedthat their dead centers shall not be together.

6. In a mechanical movement the combination of three alined revolnblemembers pins in such positions that the center lines of a three of thesaid pins shall intersect the axis of the said members at the same pointand that the center line of one of the said pins shall make an angle of90 with the said axis and the center lines of the other two of the saidpins shall make angles of 45 with the said axis; two rings having theshape of portions of spheres with their centers at the said point ofintersection turning upon the said pinmaking an angle of 90 with theaxis as a pivot and being connected with the said pins in such a mannerthat one of the said pins shall always be 90 away from a fixed point onthe surface of one of the said spheres, which point shall be from thepin )erpendicular to the main axis and the other 45 pin shall always be90 from a point 60 from the said )erpendicular pin but on the opp0 siteside thereof from the last mentioned point and the connections with theother of the said rings being reversed so that the dead centers shallnot come together.

HENRY M. RUSSELL, JR.

Witnes es:

MARIA L. HOLLIDAY, MORGAN O. HErsrcELL.

rigidly fixed to the said members respectively said members onepin onlyon each of the

